kron 4 maureen kelly has a firsthand look at more of the neighborhood. is very little left. right here is the brick walk way that used to lead to the front door. the hand rail that used to attach to a wall and now there's nothing left there. he take a look over here if i could show you what's left to the front of the house the exterior is laying just in a pile all of these bits of stucco and chicken wire not just land on the floor now that the wood frame has been burned away. over here is what's left of the inside of the house it's very littleefef sick furniture i think these tons of metal are what's left of the heating system. over here looks like we used to be the stove in the kitchen. you can see all that's lly is bits of charred wood and twisted metal. >> federal investigators are looking into those reports from those residents who say they snowcats a few weeks prior to last thursday's explosion. christine conley is looking into that issue as well she joins us live from san bruno. >> that is what the in the investigation were a few blocks away from the fires of one we zo